"My question is this: is the drive to be prepared for every situation with select sets of gear making us materialistic? If we're constantly buying gear, talking about gear, drooling over new gear to an extreme, aren't we preoccupied with the material rather than what the gear allows us to do?"
These questions themselves beg agreement, and I do agree there is materialism here (and, of course, room for excess). But as others have intimated, not necessarily more so than other hobbies or leisurely pursuits. We sometimes forget, we're living in the most advanced economic, technological, political, and social period of human history, even if simultaneously it is also the most complicated and brutal. It's taken a very long time for us to get to this point, to actually have the leisure time to "get out there" in the first place. There was a time not too long ago when "getting out there" was a necessity, a part of life, and not a leisurely pursuit. We're pretty fortunate to be living in this day and age, to be preoccupied and/or troubled with material, intellectual, or spiritual things in the first place.
My hope, confirmed already by some here, is that we're using the opportunity we have to be preoccupied with such things in the first place (be it with gear or other intellectual/spiritual pursuits) to reach farther, learn more, and "go lighter" in ways that are not merely for escapist, self-serving, or mindless consumeristic purposes.